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目前国内以高硫煤为原料生产合成氨的小型化肥厂中,普遍采用以对苯二酚为催化剂的稀氨水脱除半水煤气中的硫化氢。对苯二酚不但价格贵,货源紧张,而且由于性质不稳定,在碱性溶液中容易氧化聚合为腐蚀酸类物质,所以消耗量大。因此迫切需要一个货源充足,价格便宜,消耗量小的新的催化剂代替对苯二酚。化学系脱硫科研组的同志经过反复实践,发现硫酸锰——水杨酸是一个较好的湿法脱硫催化剂。脱硫液的配制:在18—20滴度的碳化氨水中加入少许硫酸锰(0.1克/升)及水杨酸(0.25克/升)。脱硫试验条件:脱硫塔内径4.2Cm,以短破璃管为填料。塔内填料层高度72Cm,液体流速8—12升/时,气体流速140—240升/时,液气比17.5—20,脱硫塔喷淋密度5.78米~3/米~2时,脱硫前半水煤气中H_2S含量为4.0—7.3克/米~3,脱硫后H_2S含最<0.05克/米~3,脱硫效率>99.2％。脱硫
At present, high-sulfur coal as a raw material for the production of synthetic ammonia in small-scale fertilizer plant, the widespread use of hydroquinone as a catalyst for the removal of hydrogen sulfide in semi-water gas. Hydroquinone is not only expensive, tight supply, but also due to the nature of instability in alkaline solution easily oxidized and polymerized into corrosive acids, so consumption. Therefore, there is an urgent need for a new catalyst with sufficient supply, low price and low consumption to replace hydroquinone. After repeated practice of the desulfurization research group comrades, found that manganese sulfate - salicylic acid is a better wet desulfurization catalyst. Preparation of desulfurization solution: Add a little manganese sulfate (0.1 g / L) and salicylic acid (0.25 g / L) to the 18-20 titration carbonized ammonia solution. Desulfurization test conditions: desulfurization tower diameter 4.2Cm, with a short glass tube for the filler. Tower packing layer height of 72Cm, the liquid flow rate of 8-12 liters / hour, the gas flow rate of 140-240 liters / hour, the liquid-gas ratio of 17.5-20, desulfurization tower spray density of 5.78 m ~ 3 / m ~ 2, H_2S content of 4.0-7.3 g / m ~ 3, desulfurization H_2S containing the most <0.05 g / m ~ 3, desulfurization efficiency> 99.2%. Desulfurization